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Finding the Fourth Proportional to 18,905.67, 28,355.13 and 5,754.92

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Solution

The fourth proportional to 18,905.67, 28,355.13 and 5,754.92 is: 8,631.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.67 : 28,355.13 = 5,754.92 : x
  2. Step 2: Convert to fraction form
    18,905.67/28,355.13 = 5,754.92/x
  3. Step 3: Cross multiply
    18,905.67x = 28,355.13 × 5,754.92
  4. Step 4: Simplify right side
    18,905.67x = 163,181,362.96
  5. Step 5: Solve for x
    x = 163,181,362.96/18,905.67
  6. Step 6: Final answer
    x = 8,631.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.